Table B-4. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Shipment Size for CBSA of Origin: 2002

Table B-4. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Shipment Size for CBSA of Origin: 2002

[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]

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All modes

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 19.2 28.0 25.3 7.7
Less than 50 lbs 14.2 3.5 21.4 0.2 25.7 0.3 7.5
50 to 99 lbs 28.0 0.7 29.2 39.1 0.1 14.3
100 to 499 lbs 29.2 3.1 18.1 0.6 22.3 0.5 25.4
500 to 749 lbs 31.9 0.9 11.9 0.2 19.1 0.1 12.6
750 to 999 lbs 31.2 0.4 27.7 17.2 0.1 23.1
1,000 to 9,999 lbs 19.2 1.8 9.3 1.4 11.2 1.3 9.0
10,000 to 49,999 lbs 29.3 5.7 22.6 5.7 13.6 4.3 21.9
50,000 to 99,999 lbs 22.0 0.3 23.2 4.8 44.4 1.3 S
100,000 lbs or more 44.9 1.1 48.7 7.0 37.8 5.5 32.3

Single modes

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 21.0 28.7 27.2 13.4
Less than 50 lbs 23.8 3.9 40.1 0.1 26.9 18.4
50 to 99 lbs 28.5 0.2 29.7 33.0 25.5
100 to 499 lbs 30.4 3.4 21.0 0.6 25.1 0.7 17.3
500 to 749 lbs 32.0 1.1 13.0 0.2 20.1 0.2 13.2
750 to 999 lbs 32.9 0.3 28.2 17.5 0.1 23.3
1,000 to 9,999 lbs 21.6 2.2 10.4 1.6 12.6 1.5 10.1
10,000 to 49,999 lbs 29.6 5.8 23.1 5.9 14.4 5.4 22.7
50,000 to 99,999 lbs 22.3 0.3 23.6 4.9 44.9 1.4 S
100,000 lbs or more 46.9 1.3 49.5 7.5 41.4 7.3 23.4

Truck

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 23.2 14.8 15.0 11.5
Less than 50 lbs 24.5 0.6 47.1 0.1 S S 26.0
50 to 99 lbs 34.0 0.2 29.9 34.6 31.2
100 to 499 lbs 32.5 4.1 21.0 0.7 25.5 0.7 17.3
500 to 749 lbs 33.1 0.9 13.4 0.2 21.0 0.2 13.1
750 to 999 lbs 32.9 0.4 27.9 17.5 0.2 23.0
1,000 to 9,999 lbs 21.6 2.2 10.4 1.5 12.6 1.4 10.0
10,000 to 49,999 lbs 29.7 6.1 22.3 6.1 15.5 3.8 22.9
50,000 to 99,999 lbs 22.6 0.4 24.5 5.6 45.5 3.0 S
100,000 lbs or more 31.6 0.1 S S 38.5 2.7 23.7

Rail

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 29.5 46.9 43.3 15.7
Less than 50 lbs S S S S S S 31.6
50 to 99 lbs
100 to 499 lbs
500 to 749 lbs
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs S S S S S S 24.4
10,000 to 49,999 lbs 44.1 7.4 48.4 6.9 40.4 7.2 27.2
50,000 to 99,999 lbs 42.1 0.9 S S 48.7 0.4 26.9
100,000 lbs or more 30.6 8.2 48.4 7.5 45.5 7.4 14.2

All other Single modes

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 22.7 S S 44.4 6.5
Less than 50 lbs 26.8 10.2 19.9 9.2 21.0 9.3 2.7
50 to 99 lbs S S S S S S 26.5
100 to 499 lbs 38.0 1.2 30.1 1.1 28.0 1.4 42.8
500 to 749 lbs S S S S S S 36.3
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs S S S S S S S
10,000 to 49,999 lbs S S S S S S S
50,000 to 99,999 lbs S S S S S S S
100,000 lbs or more S S S S 44.8 12.9 S

Multiple modes

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 14.9 33.5 44.9 6.6
Less than 50 lbs 16.1 6.8 24.5 9.2 29.5 9.7 6.9
50 to 99 lbs 32.6 3.2 38.3 4.3 44.3 3.8 11.2
100 to 499 lbs 38.8 3.7 34.4 3.6 44.8 4.8 13.7
500 to 749 lbs S S S S 46.4 0.3 25.7
750 to 999 lbs S S S S S S 29.5
1,000 to 9,999 lbs
10,000 to 49,999 lbs S S S S S S 35.8
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more S S S S S S 26.7

Parcel, USPS or courier

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 15.1 27.2 34.4 6.6
Less than 50 lbs 16.1 6.4 24.6 4.9 29.6 6.2 6.9
50 to 99 lbs 32.6 3.3 38.4 4.0 44.7 3.6 11.3
100 to 499 lbs 38.9 4.0 34.7 4.4 46.1 5.0 13.9
500 to 749 lbs S S S S 46.4 1.2 25.7
750 to 999 lbs S S S S S S 31.8
1,000 to 9,999 lbs
10,000 to 49,999 lbs
50,000 to 99,999 lbs
100,000 lbs or more

All other multiple modes

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 49.6 S S S S 21.0
Less than 50 lbs S S S S S S 31.6
50 to 99 lbs S S S S S S 31.6
100 to 499 lbs S S S S S S 27.9
500 to 749 lbs
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs
10,000 to 49,999 lbs S S S S S S 35.8
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more S S S S S S 26.7

Other and unknown modes

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 31.2 38.8 40.7 36.4
Less than 50 lbs S S S S S S 37.6
50 to 99 lbs S S S S 44.9 1.3 S
100 to 499 lbs 46.3 1.8 42.4 2.4 S S 29.0
500 to 749 lbs S S S S S S 30.1
750 to 999 lbs S S S S S S S
1,000 to 9,999 lbs 44.0 13.5 S S S S 23.7
10,000 to 49,999 lbs S S S S S S 35.3
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more S S S S S S 30.3

KEY:
– Represents data cell equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards because of high sampling variability or poor response quality.
CV Coefficient of variation of number

NOTE: The Introduction and appendixes give information onf confidentiality protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be found at www.census.gov/cfs.

SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Metropolitan Data, December 2004.